merged tcl 8.1 branch back into the main trunk

1 files changed, 1915 insertions, 629 deletions

diff --git a/generic/tclParse.c b/generic/tclParse.c
index b822c24..679b039 100644
--- a/generic/tclParse.c
+++ b/generic/tclParse.c
@@ -1,727 +1,1744 @@
 /* 
  * tclParse.c --
  *
- *	This file contains a collection of procedures that are used
- *	to parse Tcl commands or parts of commands (like quoted
- *	strings or nested sub-commands).
+ *	This file contains procedures that parse Tcl scripts.  They
+ *	do so in a general-purpose fashion that can be used for many
+ *	different purposes, including compilation, direct execution,
+ *	code analysis, etc.  This file also includes a few additional
+ *	procedures such as Tcl_EvalObjv, Tcl_Eval, and Tcl_EvalEx, which
+ *	allow scripts to be evaluated directly, without compiling.
  *
- * Copyright (c) 1987-1993 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ * Copyright (c) 1997 Sun Microsystems, Inc.
+ * Copyright (c) 1998 by Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclParse.c,v 1.2 1998/09/14 18:40:01 stanton Exp $
+ * RCS: @(#) $Id: tclParse.c,v 1.3 1999/04/16 00:46:51 stanton Exp $
  */
 
 #include "tclInt.h"
 #include "tclPort.h"
 
 /*
- * Function prototypes for procedures local to this file:
+ * The following table provides parsing information about each possible
+ * 8-bit character.  The table is designed to be referenced with either
+ * signed or unsigned characters, so it has 384 entries.  The first 128
+ * entries correspond to negative character values, the next 256 correspond
+ * to positive character values.  The last 128 entries are identical to the
+ * first 128.  The table is always indexed with a 128-byte offset (the 128th
+ * entry corresponds to a character value of 0).
+ *
+ * The macro CHAR_TYPE is used to index into the table and return
+ * information about its character argument.  The following return
+ * values are defined.
+ *
+ * TYPE_NORMAL -	All characters that don't have special significance
+ *			to the Tcl parser.
+ * TYPE_SPACE -		The character is a whitespace character other
+ *			than newline.
+ * TYPE_COMMAND_END -	Character is newline or semicolon.
+ * TYPE_SUBS -		Character begins a substitution or has other
+ *			special meaning in ParseTokens: backslash, dollar
+ *			sign, open bracket, or null.
+ * TYPE_QUOTE -		Character is a double quote.
+ * TYPE_CLOSE_PAREN -	Character is a right parenthesis.
+ * TYPE_CLOSE_BRACK -	Character is a right square bracket.
+ * TYPE_BRACE -		Character is a curly brace (either left or right).
+ */
+
+#define TYPE_NORMAL		0
+#define TYPE_SPACE		0x1
+#define TYPE_COMMAND_END	0x2
+#define TYPE_SUBS		0x4
+#define TYPE_QUOTE		0x8
+#define TYPE_CLOSE_PAREN	0x10
+#define TYPE_CLOSE_BRACK	0x20
+#define TYPE_BRACE		0x40
+
+#define CHAR_TYPE(c) (typeTable+128)[(int)(c)]
+
+char typeTable[] = {
+    /*
+     * Negative character values, from -128 to -1:
+     */
+
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+
+    /*
+     * Positive character values, from 0-127:
+     */
+
+    TYPE_SUBS,        TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_SPACE,       TYPE_COMMAND_END, TYPE_SPACE,
+    TYPE_SPACE,       TYPE_SPACE,       TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_SPACE,       TYPE_NORMAL,      TYPE_QUOTE,       TYPE_NORMAL,
+    TYPE_SUBS,        TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_CLOSE_PAREN, TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_COMMAND_END,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_SUBS,
+    TYPE_SUBS,        TYPE_CLOSE_BRACK, TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_BRACE,
+    TYPE_NORMAL,      TYPE_BRACE,       TYPE_NORMAL,      TYPE_NORMAL,
+
+    /*
+     * Large unsigned character values, from 128-255:
+     */
+
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+    TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,      TYPE_NORMAL,
+};
+
+/*
+ * Prototypes for local procedures defined in this file:
  */
 
-static char *	QuoteEnd _ANSI_ARGS_((char *string, char *lastChar,
-		    int term));
-static char *	ScriptEnd _ANSI_ARGS_((char *p, char *lastChar,
-		    int nested));
-static char *	VarNameEnd _ANSI_ARGS_((char *string,  char *lastChar));
+static int		CommandComplete _ANSI_ARGS_((char *script,
+			    int length));
+static int		ParseTokens _ANSI_ARGS_((char *src, int mask,
+			    Tcl_Parse *parsePtr));
+static int		EvalObjv _ANSI_ARGS_((Tcl_Interp *interp, int objc,
+			    Tcl_Obj *CONST objv[], char *command, int length,
+			    int flags));
 
 /*
- *--------------------------------------------------------------
+ *----------------------------------------------------------------------
  *
- * TclParseQuotes --
+ * Tcl_ParseCommand --
  *
- *	This procedure parses a double-quoted string such as a
- *	quoted Tcl command argument or a quoted value in a Tcl
- *	expression.  This procedure is also used to parse array
- *	element names within parentheses, or anything else that
- *	needs all the substitutions that happen in quotes.
+ *	Given a string, this procedure parses the first Tcl command
+ *	in the string and returns information about the structure of
+ *	the command.
  *
  * Results:
- *	The return value is a standard Tcl result, which is
- *	TCL_OK unless there was an error while parsing the
- *	quoted string.  If an error occurs then interp->result
- *	contains a standard error message.  *TermPtr is filled
- *	in with the address of the character just after the
- *	last one successfully processed;  this is usually the
- *	character just after the matching close-quote.  The
- *	fully-substituted contents of the quotes are stored in
- *	standard fashion in *pvPtr, null-terminated with
- *	pvPtr->next pointing to the terminating null character.
+ *	The return value is TCL_OK if the command was parsed
+ *	successfully and TCL_ERROR otherwise.  If an error occurs
+ *	and interp isn't NULL then an error message is left in
+ *	its result.  On a successful return, parsePtr is filled in
+ *	with information about the command that was parsed.
  *
  * Side effects:
- *	The buffer space in pvPtr may be enlarged by calling its
- *	expandProc.
+ *	If there is insufficient space in parsePtr to hold all the
+ *	information about the command, then additional space is
+ *	malloc-ed.  If the procedure returns TCL_OK then the caller must
+ *	eventually invoke Tcl_FreeParse to release any additional space
+ *	that was allocated.
  *
- *--------------------------------------------------------------
+ *----------------------------------------------------------------------
  */
 
 int
-TclParseQuotes(interp, string, termChar, flags, termPtr, pvPtr)
-    Tcl_Interp *interp;		/* Interpreter to use for nested command
-				 * evaluations and error messages. */
-    char *string;		/* Character just after opening double-
-				 * quote. */
-    int termChar;		/* Character that terminates "quoted" string
-				 * (usually double-quote, but sometimes
-				 * right-paren or something else). */
-    int flags;			/* Flags to pass to nested Tcl_Eval calls. */
-    char **termPtr;		/* Store address of terminating character
-				 * here. */
-    ParseValue *pvPtr;		/* Information about where to place
-				 * fully-substituted result of parse. */
+Tcl_ParseCommand(interp, string, numBytes, nested, parsePtr)
+    Tcl_Interp *interp;		/* Interpreter to use for error reporting;
+				 * if NULL, then no error message is
+				 * provided. */
+    char *string;		/* First character of string containing
+				 * one or more Tcl commands.  The string
+				 * must be in writable memory and must
+				 * have one additional byte of space at
+				 * string[length] where we can
+				 * temporarily store a 0 sentinel
+				 * character. */
+    int numBytes;		/* Total number of bytes in string.  If < 0,
+				 * the script consists of all bytes up to 
+				 * the first null character. */
+    int nested;			/* Non-zero means this is a nested command:
+				 * close bracket should be considered
+				 * a command terminator. If zero, then close
+				 * bracket has no special meaning. */
+    register Tcl_Parse *parsePtr;
+    				/* Structure to fill in with information
+				 * about the parsed command; any previous
+				 * information in the structure is
+				 * ignored. */
 {
-    register char *src, *dst, c;
-    char *lastChar = string + strlen(string);
+    register char *src;		/* Points to current character
+				 * in the command. */
+    int type;			/* Result returned by CHAR_TYPE(*src). */
+    Tcl_Token *tokenPtr;	/* Pointer to token being filled in. */
+    int wordIndex;		/* Index of word token for current word. */
+    char utfBytes[TCL_UTF_MAX];	/* Holds result of backslash substitution. */
+    int terminators;		/* CHAR_TYPE bits that indicate the end
+				 * of a command. */
+    char *termPtr;		/* Set by Tcl_ParseBraces/QuotedString to
+				 * point to char after terminating one. */
+    int length, savedChar;
 
-    src = string;
-    dst = pvPtr->next;
 
+    if (numBytes < 0) {
+	numBytes = (string? strlen(string) : 0);
+    }
+    parsePtr->commentStart = NULL;
+    parsePtr->commentSize = 0;
+    parsePtr->commandStart = NULL;
+    parsePtr->commandSize = 0;
+    parsePtr->numWords = 0;
+    parsePtr->tokenPtr = parsePtr->staticTokens;
+    parsePtr->numTokens = 0;
+    parsePtr->tokensAvailable = NUM_STATIC_TOKENS;
+    parsePtr->string = string;
+    parsePtr->end = string + numBytes;
+    parsePtr->interp = interp;
+    parsePtr->incomplete = 0;
+    if (nested != 0) {
+	terminators = TYPE_COMMAND_END | TYPE_CLOSE_BRACK;
+    } else {
+	terminators = TYPE_COMMAND_END;
+    }
+
+    /*
+     * Temporarily overwrite the character just after the end of the
+     * string with a 0 byte.  This acts as a sentinel and reduces the
+     * number of places where we have to check for the end of the
+     * input string.  The original value of the byte is restored at
+     * the end of the parse.
+     */
+
+    savedChar = string[numBytes];
+    string[numBytes] = 0;
+
+    /*
+     * Parse any leading space and comments before the first word of the
+     * command.
+     */
+
+    src = string;
     while (1) {
-	if (dst == pvPtr->end) {
+	while ((CHAR_TYPE(*src) == TYPE_SPACE) || (*src == '\n')) {
+	    src++;
+	}
+	if ((*src == '\\') && (src[1] == '\n')) {
 	    /*
-	     * Target buffer space is about to run out.  Make more space.
+	     * Skip backslash-newline sequence: it should be treated
+	     * just like white space.
 	     */
 
-	    pvPtr->next = dst;
-	    (*pvPtr->expandProc)(pvPtr, 1);
-	    dst = pvPtr->next;
+	    if ((src + 2) == parsePtr->end) {
+		parsePtr->incomplete = 1;
+	    }
+	    src += 2;
+	    continue;
+	}
+	if (*src != '#') {
+	    break;
+	}
+	if (parsePtr->commentStart == NULL) {
+	    parsePtr->commentStart = src;
+	}
+	while (1) {
+	    if (src == parsePtr->end) {
+		if (nested) {
+		    parsePtr->incomplete = nested;
+		}
+		parsePtr->commentSize = src - parsePtr->commentStart;
+		break;
+	    } else if (*src == '\\') {
+		if ((src[1] == '\n') && ((src + 2) == parsePtr->end)) {
+		    parsePtr->incomplete = 1;
+		}
+		Tcl_UtfBackslash(src, &length, utfBytes);
+		src += length;
+	    } else if (*src == '\n') {
+		src++;
+		parsePtr->commentSize = src - parsePtr->commentStart;
+		break;
+	    } else {
+		src++;
+	    }
+	}
+    }
+
+    /*
+     * The following loop parses the words of the command, one word
+     * in each iteration through the loop.
+     */
+
+    parsePtr->commandStart = src;
+    while (1) {
+	/*
+	 * Create the token for the word.
+	 */
+
+	if (parsePtr->numTokens == parsePtr->tokensAvailable) {
+	    TclExpandTokenArray(parsePtr);
 	}
+	wordIndex = parsePtr->numTokens;
+	tokenPtr = &parsePtr->tokenPtr[wordIndex];
+	tokenPtr->type = TCL_TOKEN_WORD;
 
-	c = *src;
-	src++;
-	if (c == termChar) {
-	    *dst = '\0';
-	    pvPtr->next = dst;
-	    *termPtr = src;
-	    return TCL_OK;
-	} else if (CHAR_TYPE(src-1, lastChar) == TCL_NORMAL) {
-	    copy:
-	    *dst = c;
-	    dst++;
-	    continue;
-	} else if (c == '$') {
-	    int length;
-	    char *value;
+	/*
+	 * Skip white space before the word. Also skip a backslash-newline
+	 * sequence: it should be treated just like white space.
+	 */
 
-	    value = Tcl_ParseVar(interp, src-1, termPtr);
-	    if (value == NULL) {
-		return TCL_ERROR;
+	while (1) {
+	    type = CHAR_TYPE(*src);
+	    if (type == TYPE_SPACE) {
+		src++;
+		continue;
+	    } else if ((*src == '\\') && (src[1] == '\n')) {
+		if ((src + 2) == parsePtr->end) {
+		    parsePtr->incomplete = 1;
+		}
+		Tcl_UtfBackslash(src, &length, utfBytes);
+		src += length;
+		continue;
 	    }
-	    src = *termPtr;
-	    length = strlen(value);
-	    if ((pvPtr->end - dst) <= length) {
-		pvPtr->next = dst;
-		(*pvPtr->expandProc)(pvPtr, length);
-		dst = pvPtr->next;
+	    break;
+	}
+	if ((type & terminators) != 0) {
+	    src++;
+	    break;
+	}
+	if (src == parsePtr->end) {
+	    break;
+	}
+	tokenPtr->start = src;
+	parsePtr->numTokens++;
+	parsePtr->numWords++;
+
+	/*
+	 * At this point the word can have one of three forms: something
+	 * enclosed in quotes, something enclosed in braces, or an
+	 * unquoted word (anything else).
+	 */
+
+	if (*src == '"') {
+	    if (Tcl_ParseQuotedString(interp, src, (parsePtr->end - src),
+	            parsePtr, 1, &termPtr) != TCL_OK) {
+		goto error;
 	    }
-	    strcpy(dst, value);
-	    dst += length;
-	    continue;
-	} else if (c == '[') {
-	    int result;
+	    src = termPtr;
+	} else if (*src == '{') {
+	    if (Tcl_ParseBraces(interp, src, (parsePtr->end - src),
+	            parsePtr, 1, &termPtr) != TCL_OK) {
+		goto error;
+	    }
+	    src = termPtr;
+	} else {
+	    /*
+	     * This is an unquoted word.  Call ParseTokens and let it do
+	     * all of the work.
+	     */
 
-	    pvPtr->next = dst;
-	    result = TclParseNestedCmd(interp, src, flags, termPtr, pvPtr);
-	    if (result != TCL_OK) {
-		return result;
+	    if (ParseTokens(src, TYPE_SPACE|terminators, 
+		    parsePtr) != TCL_OK) {
+		goto error;
 	    }
-	    src = *termPtr;
-	    dst = pvPtr->next;
-	    continue;
-	} else if (c == '\\') {
-	    int numRead;
+	    src = parsePtr->term;
+	}
 
-	    src--;
-	    *dst = Tcl_Backslash(src, &numRead);
-	    dst++;
-	    src += numRead;
+	/*
+	 * Finish filling in the token for the word and check for the
+	 * special case of a word consisting of a single range of
+	 * literal text.
+	 */
+
+	tokenPtr = &parsePtr->tokenPtr[wordIndex];
+	tokenPtr->size = src - tokenPtr->start;
+	tokenPtr->numComponents = parsePtr->numTokens - (wordIndex + 1);
+	if ((tokenPtr->numComponents == 1)
+		&& (tokenPtr[1].type == TCL_TOKEN_TEXT)) {
+	    tokenPtr->type = TCL_TOKEN_SIMPLE_WORD;
+	}
+
+	/*
+	 * Do two additional checks: (a) make sure we're really at the
+	 * end of a word (there might have been garbage left after a
+	 * quoted or braced word), and (b) check for the end of the
+	 * command.
+	 */
+
+	type = CHAR_TYPE(*src);
+	if (type == TYPE_SPACE) {
+	    src++;
 	    continue;
-	} else if (c == '\0') {
-	    char buf[30];
-	    
-	    Tcl_ResetResult(interp);
-	    sprintf(buf, "missing %c", termChar);
-	    Tcl_SetResult(interp, buf, TCL_VOLATILE);
-	    *termPtr = string-1;
-	    return TCL_ERROR;
 	} else {
-	    goto copy;
+	    /*
+	     * Backslash-newline (and any following white space) must be
+	     * treated as if it were a space character.
+	     */
+
+	    if ((*src == '\\') && (src[1] == '\n')) {
+		if ((src + 2) == parsePtr->end) {
+		    parsePtr->incomplete = 1;
+		}
+		Tcl_UtfBackslash(src, &length, utfBytes);
+		src += length;
+		continue;
+	    }
+	}
+
+	if ((type & terminators) != 0) {
+	    src++;
+	    break;
 	}
+	if (src == parsePtr->end) {
+	    break;
+	}
+	if (interp != NULL) {
+	    if (src[-1] == '"') { 
+		Tcl_SetResult(interp, "extra characters after close-quote",
+			TCL_STATIC);
+	    } else {
+		Tcl_SetResult(interp, "extra characters after close-brace",
+			TCL_STATIC);
+	    }
+	}
+	parsePtr->term = src;
+	goto error;
+    }
+
+
+    parsePtr->commandSize = src - parsePtr->commandStart;
+    string[numBytes] = (char) savedChar;
+    return TCL_OK;
+
+    error:
+    string[numBytes] = (char) savedChar;
+    if (parsePtr->tokenPtr != parsePtr->staticTokens) {
+	ckfree((char *) parsePtr->tokenPtr);
+	parsePtr->tokenPtr = parsePtr->staticTokens;
+    }
+    if (parsePtr->commandStart == NULL) {
+	parsePtr->commandStart = string;
     }
+    parsePtr->commandSize = parsePtr->term - parsePtr->commandStart;
+    return TCL_ERROR;
 }
 
 /*
- *--------------------------------------------------------------
+ *----------------------------------------------------------------------
  *
- * TclParseNestedCmd --
+ * ParseTokens --
  *
- *	This procedure parses a nested Tcl command between
- *	brackets, returning the result of the command.
+ *	This procedure forms the heart of the Tcl parser.  It parses one
+ *	or more tokens from a string, up to a termination point
+ *	specified by the caller.  This procedure is used to parse
+ *	unquoted command words (those not in quotes or braces), words in
+ *	quotes, and array indices for variables.
  *
  * Results:
- *	The return value is a standard Tcl result, which is
- *	TCL_OK unless there was an error while executing the
- *	nested command.  If an error occurs then interp->result
- *	contains a standard error message.  *TermPtr is filled
- *	in with the address of the character just after the
- *	last one processed;  this is usually the character just
- *	after the matching close-bracket, or the null character
- *	at the end of the string if the close-bracket was missing
- *	(a missing close bracket is an error).  The result returned
- *	by the command is stored in standard fashion in *pvPtr,
- *	null-terminated, with pvPtr->next pointing to the null
- *	character.
+ *	Tokens are added to parsePtr and parsePtr->term is filled in
+ *	with the address of the character that terminated the parse (the
+ *	first one whose CHAR_TYPE matched mask or the character at
+ *	parsePtr->end).  The return value is TCL_OK if the parse
+ *	completed successfully and TCL_ERROR otherwise.  If a parse
+ *	error occurs and parsePtr->interp isn't NULL, then an error
+ *	message is left in the interpreter's result.
  *
  * Side effects:
- *	The storage space at *pvPtr may be expanded.
+ *	None.
  *
- *--------------------------------------------------------------
+ *----------------------------------------------------------------------
  */
 
-int
-TclParseNestedCmd(interp, string, flags, termPtr, pvPtr)
-    Tcl_Interp *interp;		/* Interpreter to use for nested command
-				 * evaluations and error messages. */
-    char *string;		/* Character just after opening bracket. */
-    int flags;			/* Flags to pass to nested Tcl_Eval. */
-    char **termPtr;		/* Store address of terminating character
-				 * here. */
-    register ParseValue *pvPtr;	/* Information about where to place
-				 * result of command. */
+static int
+ParseTokens(src, mask, parsePtr)
+    register char *src;		/* First character to parse. */
+    int mask;			/* Specifies when to stop parsing.  The
+				 * parse stops at the first unquoted
+				 * character whose CHAR_TYPE contains
+				 * any of the bits in mask. */
+    Tcl_Parse *parsePtr;	/* Information about parse in progress.
+				 * Updated with additional tokens and
+				 * termination information. */
 {
-    int result, length, shortfall;
-    Interp *iPtr = (Interp *) interp;
+    int type, originalTokens, varToken;
+    char utfBytes[TCL_UTF_MAX];
+    Tcl_Token *tokenPtr;
+    Tcl_Parse nested;
 
-    iPtr->evalFlags = flags | TCL_BRACKET_TERM;
-    result = Tcl_Eval(interp, string);
-    *termPtr = (string + iPtr->termOffset);
-    if (result != TCL_OK) {
-	/*
-	 * The increment below results in slightly cleaner message in
-	 * the errorInfo variable (the close-bracket will appear).
-	 */
+    /*
+     * Each iteration through the following loop adds one token of
+     * type TCL_TOKEN_TEXT, TCL_TOKEN_BS, TCL_TOKEN_COMMAND, or
+     * TCL_TOKEN_VARIABLE to parsePtr.  For TCL_TOKEN_VARIABLE tokens,
+     * additional tokens are added for the parsed variable name.
+     */
+
+    originalTokens = parsePtr->numTokens;
+    while (1) {
+	if (parsePtr->numTokens == parsePtr->tokensAvailable) {
+	    TclExpandTokenArray(parsePtr);
+	}
+	tokenPtr = &parsePtr->tokenPtr[parsePtr->numTokens];
+	tokenPtr->start = src;
+	tokenPtr->numComponents = 0;
 
-	if (**termPtr == ']') {
-	    *termPtr += 1;
+	type = CHAR_TYPE(*src);
+	if (type & mask) {
+	    break;
+	}
+
+	if ((type & TYPE_SUBS) == 0) {
+	    /*
+	     * This is a simple range of characters.  Scan to find the end
+	     * of the range.
+	     */
+
+	    while (1) {
+		src++;
+		if (CHAR_TYPE(*src) & (mask | TYPE_SUBS)) {
+		    break;
+		}
+	    }
+	    tokenPtr->type = TCL_TOKEN_TEXT;
+	    tokenPtr->size = src - tokenPtr->start;
+	    parsePtr->numTokens++;
+	} else if (*src == '$') {
+	    /*
+	     * This is a variable reference.  Call Tcl_ParseVarName to do
+	     * all the dirty work of parsing the name.
+	     */
+
+	    varToken = parsePtr->numTokens;
+	    if (Tcl_ParseVarName(parsePtr->interp, src, parsePtr->end - src,
+		    parsePtr, 1) != TCL_OK) {
+		return TCL_ERROR;
+	    }
+	    src += parsePtr->tokenPtr[varToken].size;
+	} else if (*src == '[') {
+	    /*
+	     * Command substitution.  Call Tcl_ParseCommand recursively
+	     * (and repeatedly) to parse the nested command(s), then
+	     * throw away the parse information.
+	     */
+
+	    src++;
+	    while (1) {
+		if (Tcl_ParseCommand(parsePtr->interp, src,
+			parsePtr->end - src, 1, &nested) != TCL_OK) {
+		    parsePtr->term = nested.term;
+		    parsePtr->incomplete = nested.incomplete;
+		    return TCL_ERROR;
+		}
+		src = nested.commandStart + nested.commandSize;
+		if (nested.tokenPtr != nested.staticTokens) {
+		    ckfree((char *) nested.tokenPtr);
+		}
+		if ((src[-1] == ']') && !nested.incomplete) {
+		    break;
+		}
+		if (src == parsePtr->end) {
+		    if (parsePtr->interp != NULL) {
+			Tcl_SetResult(parsePtr->interp,
+			    "missing close-bracket", TCL_STATIC);
+		    }
+		    parsePtr->term = tokenPtr->start;
+		    parsePtr->incomplete = 1;
+		    return TCL_ERROR;
+		}
+	    }
+	    tokenPtr->type = TCL_TOKEN_COMMAND;
+	    tokenPtr->size = src - tokenPtr->start;
+	    parsePtr->numTokens++;
+	} else if (*src == '\\') {
+	    /*
+	     * Backslash substitution.
+	     */
+
+	    if (src[1] == '\n') {
+		if ((src + 2) == parsePtr->end) {
+		    parsePtr->incomplete = 1;
+		}
+
+		/*
+		 * Note: backslash-newline is special in that it is
+		 * treated the same as a space character would be.  This
+		 * means that it could terminate the token.
+		 */
+
+		if (mask & TYPE_SPACE) {
+		    break;
+		}
+	    }
+	    tokenPtr->type = TCL_TOKEN_BS;
+	    Tcl_UtfBackslash(src, &tokenPtr->size, utfBytes);
+	    parsePtr->numTokens++;
+	    src += tokenPtr->size;
+	} else if (*src == 0) {
+	    /*
+	     * We encountered a null character.  If it is the null
+	     * character at the end of the string, then return.
+	     * Otherwise generate a text token for the single
+	     * character.
+	     */
+
+	    if (src == parsePtr->end) {
+		break;
+	    }
+	    tokenPtr->type = TCL_TOKEN_TEXT;
+	    tokenPtr->size = 1;
+	    parsePtr->numTokens++;
+	    src++;
+	} else {
+	    panic("ParseTokens encountered unknown character");
 	}
-	return result;
     }
-    (*termPtr) += 1;
-    length = strlen(iPtr->result);
-    shortfall = length + 1 - (pvPtr->end - pvPtr->next);
-    if (shortfall > 0) {
-	(*pvPtr->expandProc)(pvPtr, shortfall);
+    if (parsePtr->numTokens == originalTokens) {
+	/*
+	 * There was nothing in this range of text.  Add an empty token
+	 * for the empty range, so that there is always at least one
+	 * token added.
+	 */
+
+	tokenPtr->type = TCL_TOKEN_TEXT;
+	tokenPtr->size = 0;
+	parsePtr->numTokens++;
     }
-    strcpy(pvPtr->next, iPtr->result);
-    pvPtr->next += length;
-    
-    Tcl_FreeResult(interp);
-    iPtr->result = iPtr->resultSpace;
-    iPtr->resultSpace[0] = '\0';
+    parsePtr->term = src;
     return TCL_OK;
 }
 
 /*
- *--------------------------------------------------------------
+ *----------------------------------------------------------------------
  *
- * TclParseBraces --
+ * Tcl_FreeParse --
  *
- *	This procedure scans the information between matching
- *	curly braces.
+ *	This procedure is invoked to free any dynamic storage that may
+ *	have been allocated by a previous call to Tcl_ParseCommand.
  *
  * Results:
- *	The return value is a standard Tcl result, which is
- *	TCL_OK unless there was an error while parsing string.
- *	If an error occurs then interp->result contains a
- *	standard error message.  *TermPtr is filled
- *	in with the address of the character just after the
- *	last one successfully processed;  this is usually the
- *	character just after the matching close-brace.  The
- *	information between curly braces is stored in standard
- *	fashion in *pvPtr, null-terminated with pvPtr->next
- *	pointing to the terminating null character.
+ *	None.
  *
  * Side effects:
- *	The storage space at *pvPtr may be expanded.
+ *	If there is any dynamically allocated memory in *parsePtr,
+ *	it is freed.
  *
- *--------------------------------------------------------------
+ *----------------------------------------------------------------------
  */
 
-int
-TclParseBraces(interp, string, termPtr, pvPtr)
-    Tcl_Interp *interp;		/* Interpreter to use for nested command
-				 * evaluations and error messages. */
-    char *string;		/* Character just after opening bracket. */
-    char **termPtr;		/* Store address of terminating character
-				 * here. */
-    register ParseValue *pvPtr;	/* Information about where to place
-				 * result of command. */
+void
+Tcl_FreeParse(parsePtr)
+    Tcl_Parse *parsePtr;	/* Structure that was filled in by a
+				 * previous call to Tcl_ParseCommand. */
 {
-    int level;
-    register char *src, *dst, *end;
-    register char c;
-    char *lastChar = string + strlen(string);
+    if (parsePtr->tokenPtr != parsePtr->staticTokens) {
+	ckfree((char *) parsePtr->tokenPtr);
+	parsePtr->tokenPtr = parsePtr->staticTokens;
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclExpandTokenArray --
+ *
+ *	This procedure is invoked when the current space for tokens in
+ *	a Tcl_Parse structure fills up; it allocates memory to grow the
+ *	token array
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Memory is allocated for a new larger token array; the memory
+ *	for the old array is freed, if it had been dynamically allocated.
+ *
+ *----------------------------------------------------------------------
+ */
 
-    src = string;
-    dst = pvPtr->next;
-    end = pvPtr->end;
-    level = 1;
+void
+TclExpandTokenArray(parsePtr)
+    Tcl_Parse *parsePtr;	/* Parse structure whose token space
+				 * has overflowed. */
+{
+    int newCount;
+    Tcl_Token *newPtr;
+
+    newCount = parsePtr->tokensAvailable*2;
+    newPtr = (Tcl_Token *) ckalloc((unsigned) (newCount * sizeof(Tcl_Token)));
+    memcpy((VOID *) newPtr, (VOID *) parsePtr->tokenPtr,
+	    (size_t) (parsePtr->tokensAvailable * sizeof(Tcl_Token)));
+    if (parsePtr->tokenPtr != parsePtr->staticTokens) {
+	ckfree((char *) parsePtr->tokenPtr);
+	parsePtr->tokenPtr = parsePtr->staticTokens;
+    }
+    parsePtr->tokenPtr = newPtr;
+    parsePtr->tokensAvailable = newCount;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * EvalObjv --
+ *
+ *	This procedure evaluates a Tcl command that has already been
+ *	parsed into words, with one Tcl_Obj holding each word.
+ *
+ * Results:
+ *	The return value is a standard Tcl completion code such as
+ *	TCL_OK or TCL_ERROR.  A result or error message is left in
+ *	interp's result.  If an error occurs, this procedure does
+ *	NOT add any information to the errorInfo variable.
+ *
+ * Side effects:
+ *	Depends on the command.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+EvalObjv(interp, objc, objv, command, length, flags)
+    Tcl_Interp *interp;		/* Interpreter in which to evaluate the
+				 * command.  Also used for error
+				 * reporting. */
+    int objc;			/* Number of words in command. */
+    Tcl_Obj *CONST objv[];	/* An array of pointers to objects that are
+				 * the words that make up the command. */
+    char *command;		/* Points to the beginning of the string
+				 * representation of the command; this
+				 * is used for traces.  If the string
+				 * representation of the command is
+				 * unknown, an empty string should be
+				 * supplied. */
+    int length;			/* Number of bytes in command; if -1, all
+				 * characters up to the first null byte are
+				 * used. */
+    int flags;			/* Collection of OR-ed bits that control
+				 * the evaluation of the script.  Only
+				 * TCL_EVAL_GLOBAL is currently
+				 * supported. */
+
+{
+    Command *cmdPtr;
+    Interp *iPtr = (Interp *) interp;
+    Tcl_Obj **newObjv;
+    int i, code;
+    Trace *tracePtr, *nextPtr;
+    char **argv, *commandCopy;
+    CallFrame *savedVarFramePtr;	/* Saves old copy of iPtr->varFramePtr
+					 * in case TCL_EVAL_GLOBAL was set. */
+
+    Tcl_ResetResult(interp);
+    if (objc == 0) {
+	return TCL_OK;
+    }
+
+    /*
+     * If the interpreter was deleted, return an error.
+     */
+    
+    if (iPtr->flags & DELETED) {
+	Tcl_AppendToObj(Tcl_GetObjResult(interp),
+		"attempt to call eval in deleted interpreter", -1);
+	Tcl_SetErrorCode(interp, "CORE", "IDELETE",
+		"attempt to call eval in deleted interpreter",
+		(char *) NULL);
+	return TCL_ERROR;
+    }
 
     /*
-     * Copy the characters one at a time to the result area, stopping
-     * when the matching close-brace is found.
+     * Check depth of nested calls to Tcl_Eval:  if this gets too large,
+     * it's probably because of an infinite loop somewhere.
      */
 
-    while (1) {
-	c = *src;
-	src++;
-	if (dst == end) {
-	    pvPtr->next = dst;
-	    (*pvPtr->expandProc)(pvPtr, 20);
-	    dst = pvPtr->next;
-	    end = pvPtr->end;
-	}
-	*dst = c;
-	dst++;
-	if (CHAR_TYPE(src-1, lastChar) == TCL_NORMAL) {
+    if (iPtr->numLevels >= iPtr->maxNestingDepth) {
+	iPtr->result =  "too many nested calls to Tcl_Eval (infinite loop?)";
+	return TCL_ERROR;
+    }
+    iPtr->numLevels++;
+
+    /*
+     * On the Mac, we will never reach the default recursion limit before
+     * blowing the stack. So we need to do a check here.
+     */
+    
+    if (TclpCheckStackSpace() == 0) {
+	/*NOTREACHED*/
+	iPtr->numLevels--;
+	iPtr->result =  "too many nested calls to Tcl_Eval (infinite loop?)";
+	return TCL_ERROR;
+    }
+    
+    /*
+     * Find the procedure to execute this command. If there isn't one,
+     * then see if there is a command "unknown".  If so, create a new
+     * word array with "unknown" as the first word and the original
+     * command words as arguments.  Then call ourselves recursively
+     * to execute it.
+     */
+    
+    cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, objv[0]);
+    if (cmdPtr == NULL) {
+	newObjv = (Tcl_Obj **) ckalloc((unsigned)
+		((objc + 1) * sizeof (Tcl_Obj *)));
+	for (i = objc-1; i >= 0; i--) {
+	    newObjv[i+1] = objv[i];
+	}
+	newObjv[0] = Tcl_NewStringObj("unknown", -1);
+	Tcl_IncrRefCount(newObjv[0]);
+	cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, newObjv[0]);
+	if (cmdPtr == NULL) {
+	    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
+		    "invalid command name \"", Tcl_GetString(objv[0]), "\"",
+		    (char *) NULL);
+	    code = TCL_ERROR;
+	} else {
+	    code = EvalObjv(interp, objc+1, newObjv, command, length, 0);
+	}
+	Tcl_DecrRefCount(newObjv[0]);
+	ckfree((char *) newObjv);
+	goto done;
+    }
+    
+    /*
+     * Call trace procedures if needed.
+     */
+
+    argv = NULL;
+    commandCopy = command;
+
+    for (tracePtr = iPtr->tracePtr; tracePtr != NULL; tracePtr = nextPtr) {
+	nextPtr = tracePtr->nextPtr;
+	if (iPtr->numLevels > tracePtr->level) {
 	    continue;
-	} else if (c == '{') {
-	    level++;
-	} else if (c == '}') {
-	    level--;
-	    if (level == 0) {
-		dst--;			/* Don't copy the last close brace. */
-		break;
-	    }
-	} else if (c == '\\') {
-	    int count;
+	}
 
-	    /*
-	     * Must always squish out backslash-newlines, even when in
-	     * braces.  This is needed so that this sequence can appear
-	     * anywhere in a command, such as the middle of an expression.
-	     */
+	/*
+	 * This is a bit messy because we have to emulate the old trace
+	 * interface, which uses strings for everything.
+	 */
 
-	    if (*src == '\n') {
-		dst[-1] = Tcl_Backslash(src-1, &count);
-		src += count - 1;
-	    } else {
-		(void) Tcl_Backslash(src-1, &count);
-		while (count > 1) {
-                    if (dst == end) {
-                        pvPtr->next = dst;
-                        (*pvPtr->expandProc)(pvPtr, 20);
-                        dst = pvPtr->next;
-                        end = pvPtr->end;
-                    }
-		    *dst = *src;
-		    dst++;
-		    src++;
-		    count--;
-		}
+	if (argv == NULL) {
+	    argv = (char **) ckalloc((unsigned) (objc + 1) * sizeof(char *));
+	    for (i = 0; i < objc; i++) {
+		argv[i] = Tcl_GetString(objv[i]);
+	    }
+	    argv[objc] = 0;
+
+	    if (length < 0) {
+		length = strlen(command);
+	    } else if ((size_t)length < strlen(command)) {
+		commandCopy = (char *) ckalloc((unsigned) (length + 1));
+		strncpy(commandCopy, command, (size_t) length);
+		commandCopy[length] = 0;
 	    }
-	} else if (c == '\0') {
-	    Tcl_SetResult(interp, "missing close-brace", TCL_STATIC);
-	    *termPtr = string-1;
-	    return TCL_ERROR;
 	}
+	(*tracePtr->proc)(tracePtr->clientData, interp, iPtr->numLevels,
+			  commandCopy, cmdPtr->proc, cmdPtr->clientData,
+			  objc, argv);
+    }
+    if (argv != NULL) {
+	ckfree((char *) argv);
+    }
+    if (commandCopy != command) {
+	ckfree((char *) commandCopy);
+    }
+    
+    /*
+     * Finally, invoke the command's Tcl_ObjCmdProc.
+     */
+    
+    iPtr->cmdCount++;
+    savedVarFramePtr = iPtr->varFramePtr;
+    if (flags & TCL_EVAL_GLOBAL) {
+	iPtr->varFramePtr = NULL;
+    }
+    code = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, objc, objv);
+    iPtr->varFramePtr = savedVarFramePtr;
+    if (Tcl_AsyncReady()) {
+	code = Tcl_AsyncInvoke(interp, code);
     }
 
-    *dst = '\0';
-    pvPtr->next = dst;
-    *termPtr = src;
-    return TCL_OK;
+    /*
+     * If the interpreter has a non-empty string result, the result
+     * object is either empty or stale because some procedure set
+     * interp->result directly. If so, move the string result to the
+     * result object, then reset the string result.
+     */
+    
+    if (*(iPtr->result) != 0) {
+	(void) Tcl_GetObjResult(interp);
+    }
+
+    done:
+    iPtr->numLevels--;
+    return code;
 }
 
 /*
- *--------------------------------------------------------------
+ *----------------------------------------------------------------------
  *
- * TclExpandParseValue --
+ * Tcl_EvalObjv --
  *
- *	This procedure is commonly used as the value of the
- *	expandProc in a ParseValue.  It uses malloc to allocate
- *	more space for the result of a parse.
+ *	This procedure evaluates a Tcl command that has already been
+ *	parsed into words, with one Tcl_Obj holding each word.
  *
  * Results:
- *	The buffer space in *pvPtr is reallocated to something
- *	larger, and if pvPtr->clientData is non-zero the old
- *	buffer is freed.  Information is copied from the old
- *	buffer to the new one.
+ *	The return value is a standard Tcl completion code such as
+ *	TCL_OK or TCL_ERROR.  A result or error message is left in
+ *	interp's result.
  *
  * Side effects:
- *	None.
+ *	Depends on the command.
  *
- *--------------------------------------------------------------
+ *----------------------------------------------------------------------
  */
 
-void
-TclExpandParseValue(pvPtr, needed)
-    register ParseValue *pvPtr;		/* Information about buffer that
-					 * must be expanded.  If the clientData
-					 * in the structure is non-zero, it
-					 * means that the current buffer is
-					 * dynamically allocated. */
-    int needed;				/* Minimum amount of additional space
-					 * to allocate. */
+int
+Tcl_EvalObjv(interp, objc, objv, flags)
+    Tcl_Interp *interp;		/* Interpreter in which to evaluate the
+				 * command.  Also used for error
+				 * reporting. */
+    int objc;			/* Number of words in command. */
+    Tcl_Obj *CONST objv[];	/* An array of pointers to objects that are
+				 * the words that make up the command. */
+    int flags;			/* Collection of OR-ed bits that control
+				 * the evaluation of the script.  Only
+				 * TCL_EVAL_GLOBAL is currently
+				 * supported. */
 {
-    int newSpace;
-    char *new;
+    Interp *iPtr = (Interp *)interp;
+    Trace *tracePtr;
+    Tcl_DString cmdBuf;
+    char *cmdString = "";
+    int cmdLen = 0;
+    int code = TCL_OK;
 
-    /*
-     * Either double the size of the buffer or add enough new space
-     * to meet the demand, whichever produces a larger new buffer.
-     */
-
-    newSpace = (pvPtr->end - pvPtr->buffer) + 1;
-    if (newSpace < needed) {
-	newSpace += needed;
-    } else {
-	newSpace += newSpace;
+    for (tracePtr = iPtr->tracePtr; tracePtr; tracePtr = tracePtr->nextPtr) {
+	/*
+	 * EvalObjv will increment numLevels so use "<" rather than "<="
+	 */
+	if (iPtr->numLevels < tracePtr->level) {
+	    int i;
+	    /*
+	     * The command will be needed for an execution trace or stack trace
+	     * generate a command string.
+	     */
+	cmdtraced:
+	    Tcl_DStringInit(&cmdBuf);
+	    for (i = 0; i < objc; i++) {
+		Tcl_DStringAppendElement(&cmdBuf, Tcl_GetString(objv[i]));
+	    }
+	    cmdString = Tcl_DStringValue(&cmdBuf);
+	    cmdLen = Tcl_DStringLength(&cmdBuf);
+	    break;
+	}
     }
-    new = (char *) ckalloc((unsigned) newSpace);
 
     /*
-     * Copy from old buffer to new, free old buffer if needed, and
-     * mark new buffer as malloc-ed.
+     * Execute the command if we have not done so already
      */
+    switch (code) {
+	case TCL_OK:
+	    code = EvalObjv(interp, objc, objv, cmdString, cmdLen, flags);
+	    if (code == TCL_ERROR && cmdLen == 0)
+		goto cmdtraced;
+	    break;
+	case TCL_ERROR:
+	    Tcl_LogCommandInfo(interp, cmdString, cmdString, cmdLen);
+	    break;
+	default:
+	    /*NOTREACHED*/
+	    break;
+    }
 
-    memcpy((VOID *) new, (VOID *) pvPtr->buffer,
-	    (size_t) (pvPtr->next - pvPtr->buffer));
-    pvPtr->next = new + (pvPtr->next - pvPtr->buffer);
-    if (pvPtr->clientData != 0) {
-	ckfree(pvPtr->buffer);
+    if (cmdLen != 0) {
+	Tcl_DStringFree(&cmdBuf);
     }
-    pvPtr->buffer = new;
-    pvPtr->end = new + newSpace - 1;
-    pvPtr->clientData = (ClientData) 1;
+    return code;
 }
 
 /*
  *----------------------------------------------------------------------
  *
- * TclWordEnd --
+ * Tcl_LogCommandInfo --
  *
- *	Given a pointer into a Tcl command, find the end of the next
- *	word of the command.
+ *	This procedure is invoked after an error occurs in an interpreter.
+ *	It adds information to the "errorInfo" variable to describe the
+ *	command that was being executed when the error occurred.
  *
  * Results:
- *	The return value is a pointer to the last character that's part
- *	of the word pointed to by "start".  If the word doesn't end
- *	properly within the string then the return value is the address
- *	of the null character at the end of the string.
+ *	None.
  *
  * Side effects:
- *	None.
+ *	Information about the command is added to errorInfo and the
+ *	line number stored internally in the interpreter is set.  If this
+ *	is the first call to this procedure or Tcl_AddObjErrorInfo since
+ *	an error occurred, then old information in errorInfo is
+ *	deleted.
  *
  *----------------------------------------------------------------------
  */
 
-char *
-TclWordEnd(start, lastChar, nested, semiPtr)
-    char *start;		/* Beginning of a word of a Tcl command. */
-    char *lastChar;		/* Terminating character in string. */
-    int nested;			/* Zero means this is a top-level command.
-				 * One means this is a nested command (close
-				 * bracket is a word terminator). */
-    int *semiPtr;		/* Set to 1 if word ends with a command-
-				 * terminating semi-colon, zero otherwise.
-				 * If NULL then ignored. */
+void
+Tcl_LogCommandInfo(interp, script, command, length)
+    Tcl_Interp *interp;		/* Interpreter in which to log information. */
+    char *script;		/* First character in script containing
+				 * command (must be <= command). */
+    char *command;		/* First character in command that
+				 * generated the error. */
+    int length;			/* Number of bytes in command (-1 means
+				 * use all bytes up to first null byte). */
 {
+    char buffer[200];
     register char *p;
-    int count;
+    char *ellipsis = "";
+    Interp *iPtr = (Interp *) interp;
+
+    if (iPtr->flags & ERR_ALREADY_LOGGED) {
+	/*
+	 * Someone else has already logged error information for this
+	 * command; we shouldn't add anything more.
+	 */
 
-    if (semiPtr != NULL) {
-	*semiPtr = 0;
+	return;
     }
 
     /*
-     * Skip leading white space (backslash-newline must be treated like
-     * white-space, except that it better not be the last thing in the
-     * command).
+     * Compute the line number where the error occurred.
      */
 
-    for (p = start; ; p++) {
-	if (isspace(UCHAR(*p))) {
-	    continue;
+    iPtr->errorLine = 1;
+    for (p = script; p != command; p++) {
+	if (*p == '\n') {
+	    iPtr->errorLine++;
 	}
-	if ((p[0] == '\\') && (p[1] == '\n')) {
-	    if (p+2 == lastChar) {
-		return p+2;
-	    }
-	    continue;
-	}
-	break;
     }
 
     /*
-     * Handle words beginning with a double-quote or a brace.
+     * Create an error message to add to errorInfo, including up to a
+     * maximum number of characters of the command.
      */
 
-    if (*p == '"') {
-	p = QuoteEnd(p+1, lastChar, '"');
-	if (p == lastChar) {
-	    return p;
-	}
-	p++;
-    } else if (*p == '{') {
-	int braces = 1;
-	while (braces != 0) {
-	    p++;
-	    while (*p == '\\') {
-		(void) Tcl_Backslash(p, &count);
-		p += count;
-	    }
-	    if (*p == '}') {
-		braces--;
-	    } else if (*p == '{') {
-		braces++;
-	    } else if (p == lastChar) {
-		return p;
-	    }
-	}
-	p++;
+    if (length < 0) {
+	length = strlen(command);
+    }
+    if (length > 150) {
+	length = 150;
+	ellipsis = "...";
     }
+    if (!(iPtr->flags & ERR_IN_PROGRESS)) {
+	sprintf(buffer, "\n    while executing\n\"%.*s%s\"",
+		length, command, ellipsis);
+    } else {
+	sprintf(buffer, "\n    invoked from within\n\"%.*s%s\"",
+		length, command, ellipsis);
+    }
+    Tcl_AddObjErrorInfo(interp, buffer, -1);
+    iPtr->flags &= ~ERR_ALREADY_LOGGED;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_EvalTokens --
+ *
+ *	Given an array of tokens parsed from a Tcl command (e.g., the
+ *	tokens that make up a word or the index for an array variable)
+ *	this procedure evaluates the tokens and concatenates their
+ *	values to form a single result value.
+ *
+ * Results:
+ *	The return value is a pointer to a newly allocated Tcl_Obj
+ *	containing the value of the array of tokens.  The reference
+ *	count of the returned object has been incremented.  If an error
+ *	occurs in evaluating the tokens then a NULL value is returned
+ *	and an error message is left in interp's result.
+ *
+ * Side effects:
+ *	A new object is allocated to hold the result.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Obj *
+Tcl_EvalTokens(interp, tokenPtr, count)
+    Tcl_Interp *interp;		/* Interpreter in which to lookup
+				 * variables, execute nested commands,
+				 * and report errors. */
+    Tcl_Token *tokenPtr;	/* Pointer to first in an array of tokens
+				 * to evaluate and concatenate. */
+    int count;			/* Number of tokens to consider at tokenPtr.
+				 * Must be at least 1. */
+{
+    Tcl_Obj *resultPtr, *indexPtr, *valuePtr, *newPtr;
+    char buffer[TCL_UTF_MAX];
+#ifdef TCL_MEM_DEBUG
+#   define  MAX_VAR_CHARS 5
+#else
+#   define  MAX_VAR_CHARS 30
+#endif
+    char nameBuffer[MAX_VAR_CHARS+1];
+    char *varName, *index;
+    char *p = NULL;		/* Initialized to avoid compiler warning. */
+    int length, code;
 
     /*
-     * Handle words that don't start with a brace or double-quote.
-     * This code is also invoked if the word starts with a brace or
-     * double-quote and there is garbage after the closing brace or
-     * quote.  This is an error as far as Tcl_Eval is concerned, but
-     * for here the garbage is treated as part of the word.
+     * The only tricky thing about this procedure is that it attempts to
+     * avoid object creation and string copying whenever possible.  For
+     * example, if the value is just a nested command, then use the
+     * command's result object directly.
      */
 
-    while (1) {
-	if (*p == '[') {
-	    p = ScriptEnd(p+1, lastChar, 1);
-	    if (p == lastChar) {
-		return p;
-	    }
-	    p++;
-	} else if (*p == '\\') {
-	    if (p[1] == '\n') {
-		/*
-		 * Backslash-newline:  it maps to a space character
-		 * that is a word separator, so the word ends just before
-		 * the backslash.
-		 */
+    resultPtr = NULL;
+    for ( ; count > 0; count--, tokenPtr++) {
+	valuePtr = NULL;
 
-		return p-1;
-	    }
-	    (void) Tcl_Backslash(p, &count);
-	    p += count;
-	} else if (*p == '$') {
-	    p = VarNameEnd(p, lastChar);
-	    if (p == lastChar) {
-		return p;
-	    }
-	    p++;
-	} else if (*p == ';') {
-	    /*
-	     * Include the semi-colon in the word that is returned.
-	     */
+	/*
+	 * The switch statement below computes the next value to be
+	 * concat to the result, as either a range of text or an
+	 * object.
+	 */
+
+	switch (tokenPtr->type) {
+	    case TCL_TOKEN_TEXT:
+		p = tokenPtr->start;
+		length = tokenPtr->size;
+		break;
+
+	    case TCL_TOKEN_BS:
+		length = Tcl_UtfBackslash(tokenPtr->start, (int *) NULL,
+			buffer);
+		p = buffer;
+		break;
+
+	    case TCL_TOKEN_COMMAND:
+		code = Tcl_EvalEx(interp, tokenPtr->start+1, tokenPtr->size-2,
+			0);
+		if (code != TCL_OK) {
+		    goto error;
+		}
+		valuePtr = Tcl_GetObjResult(interp);
+		break;
+
+	    case TCL_TOKEN_VARIABLE:
+		if (tokenPtr->numComponents == 1) {
+		    indexPtr = NULL;
+		} else {
+		    indexPtr = Tcl_EvalTokens(interp, tokenPtr+2,
+			    tokenPtr->numComponents - 1);
+		    if (indexPtr == NULL) {
+			goto error;
+		    }
+		}
 
-	    if (semiPtr != NULL) {
-		*semiPtr = 1;
-	    }
-	    return p;
-	} else if (isspace(UCHAR(*p))) {
-	    return p-1;
-	} else if ((*p == ']') && nested) {
-	    return p-1;
-	} else if (p == lastChar) {
-	    if (nested) {
 		/*
-		 * Nested commands can't end because of the end of the
-		 * string.
+		 * We have to make a copy of the variable name in order
+		 * to have a null-terminated string.  We can't make a
+		 * temporary modification to the script to null-terminate
+		 * the name, because a trace callback might potentially
+		 * reuse the script and be affected by the null character.
 		 */
-		return p;
+
+		if (tokenPtr[1].size <= MAX_VAR_CHARS) {
+		    varName = nameBuffer;
+		} else {
+		    varName = ckalloc((unsigned) (tokenPtr[1].size + 1));
+		}
+		strncpy(varName, tokenPtr[1].start, (size_t) tokenPtr[1].size);
+		varName[tokenPtr[1].size] = 0;
+		if (indexPtr != NULL) {
+		    index = TclGetString(indexPtr);
+		} else {
+		    index = NULL;
+		}
+		valuePtr = Tcl_GetVar2Ex(interp, varName, index,
+			TCL_LEAVE_ERR_MSG);
+		if (varName != nameBuffer) {
+		    ckfree(varName);
+		}
+		if (indexPtr != NULL) {
+		    Tcl_DecrRefCount(indexPtr);
+		}
+		if (valuePtr == NULL) {
+		    goto error;
+		}
+		count -= tokenPtr->numComponents;
+		tokenPtr += tokenPtr->numComponents;
+		break;
+
+	    default:
+		panic("unexpected token type in Tcl_EvalTokens");
+	}
+
+	/*
+	 * If valuePtr isn't NULL, the next piece of text comes from that
+	 * object; otherwise, take length bytes starting at p.
+	 */
+
+	if (resultPtr == NULL) {
+	    if (valuePtr != NULL) {
+		resultPtr = valuePtr;
+	    } else {
+		resultPtr = Tcl_NewStringObj(p, length);
 	    }
-	    return p-1;
+	    Tcl_IncrRefCount(resultPtr);
 	} else {
-	    p++;
+	    if (Tcl_IsShared(resultPtr)) {
+		newPtr = Tcl_DuplicateObj(resultPtr);
+		Tcl_DecrRefCount(resultPtr);
+		resultPtr = newPtr;
+		Tcl_IncrRefCount(resultPtr);
+	    }
+	    if (valuePtr != NULL) {
+		p = Tcl_GetStringFromObj(valuePtr, &length);
+	    }
+	    Tcl_AppendToObj(resultPtr, p, length);
 	}
     }
+    return resultPtr;
+
+    error:
+    if (resultPtr != NULL) {
+	Tcl_DecrRefCount(resultPtr);
+    }
+    return NULL;
 }
 
 /*
  *----------------------------------------------------------------------
  *
- * QuoteEnd --
+ * Tcl_EvalEx --
  *
- *	Given a pointer to a string that obeys the parsing conventions
- *	for quoted things in Tcl, find the end of that quoted thing.
- *	The actual thing may be a quoted argument or a parenthesized
- *	index name.
+ *	This procedure evaluates a Tcl script without using the compiler
+ *	or byte-code interpreter.  It just parses the script, creates
+ *	values for each word of each command, then calls EvalObjv
+ *	to execute each command.
  *
  * Results:
- *	The return value is a pointer to the last character that is
- *	part of the quoted string (i.e the character that's equal to
- *	term).  If the quoted string doesn't terminate properly then
- *	the return value is a pointer to the null character at the
- *	end of the string.
+ *	The return value is a standard Tcl completion code such as
+ *	TCL_OK or TCL_ERROR.  A result or error message is left in
+ *	interp's result.
  *
  * Side effects:
- *	None.
+ *	Depends on the script.
  *
  *----------------------------------------------------------------------
  */
 
-static char *
-QuoteEnd(string, lastChar, term)
-    char *string;		/* Pointer to character just after opening
-				 * "quote". */
-    char *lastChar;		/* Terminating character in string. */
-    int term;			/* This character will terminate the
-				 * quoted string (e.g. '"' or ')'). */
+int
+Tcl_EvalEx(interp, script, numBytes, flags)
+    Tcl_Interp *interp;		/* Interpreter in which to evaluate the
+				 * script.  Also used for error reporting. */
+    char *script;		/* First character of script to evaluate. */
+    int numBytes;		/* Number of bytes in script.  If < 0, the
+				 * script consists of all bytes up to the
+				 * first null character. */
+    int flags;			/* Collection of OR-ed bits that control
+				 * the evaluation of the script.  Only
+				 * TCL_EVAL_GLOBAL is currently
+				 * supported. */
 {
-    register char *p = string;
-    int count;
-
-    while (*p != term) {
-	if (*p == '\\') {
-	    (void) Tcl_Backslash(p, &count);
-	    p += count;
-	} else if (*p == '[') {
-	    for (p++; *p != ']'; p++) {
-		p = TclWordEnd(p, lastChar, 1, (int *) NULL);
-		if (*p == 0) {
-		    return p;
+    Interp *iPtr = (Interp *) interp;
+    char *p, *next;
+    Tcl_Parse parse;
+#define NUM_STATIC_OBJS 20
+    Tcl_Obj *staticObjArray[NUM_STATIC_OBJS], **objv;
+    Tcl_Token *tokenPtr;
+    int i, code, commandLength, bytesLeft, nested;
+    CallFrame *savedVarFramePtr;	/* Saves old copy of iPtr->varFramePtr
+					 * in case TCL_EVAL_GLOBAL was set. */
+
+    /*
+     * The variables below keep track of how much state has been
+     * allocated while evaluating the script, so that it can be freed
+     * properly if an error occurs.
+     */
+
+    int gotParse = 0, objectsUsed = 0;
+
+    if (numBytes < 0) {
+	numBytes = strlen(script);
+    }
+    Tcl_ResetResult(interp);
+
+    savedVarFramePtr = iPtr->varFramePtr;
+    if (flags & TCL_EVAL_GLOBAL) {
+	iPtr->varFramePtr = NULL;
+    }
+
+    /*
+     * Each iteration through the following loop parses the next
+     * command from the script and then executes it.
+     */
+
+    objv = staticObjArray;
+    p = script;
+    bytesLeft = numBytes;
+    if (iPtr->evalFlags & TCL_BRACKET_TERM) {
+	nested = 1;
+    } else {
+	nested = 0;
+    }
+    iPtr->evalFlags = 0;
+    do {
+	if (Tcl_ParseCommand(interp, p, bytesLeft, nested, &parse)
+	        != TCL_OK) {
+	    code = TCL_ERROR;
+	    goto error;
+	}
+	gotParse = 1; 
+	if (parse.numWords > 0) {
+	    /*
+	     * Generate an array of objects for the words of the command.
+	     */
+    
+	    if (parse.numWords <= NUM_STATIC_OBJS) {
+		objv = staticObjArray;
+	    } else {
+		objv = (Tcl_Obj **) ckalloc((unsigned)
+		    (parse.numWords * sizeof (Tcl_Obj *)));
+	    }
+	    for (objectsUsed = 0, tokenPtr = parse.tokenPtr;
+		    objectsUsed < parse.numWords;
+		    objectsUsed++, tokenPtr += (tokenPtr->numComponents + 1)) {
+		objv[objectsUsed] = Tcl_EvalTokens(interp, tokenPtr+1,
+			tokenPtr->numComponents);
+		if (objv[objectsUsed] == NULL) {
+		    code = TCL_ERROR;
+		    goto error;
 		}
 	    }
-	    p++;
-	} else if (*p == '$') {
-	    p = VarNameEnd(p, lastChar);
-	    if (*p == 0) {
-		return p;
+    
+	    /*
+	     * Execute the command and free the objects for its words.
+	     */
+    
+	    code = EvalObjv(interp, objectsUsed, objv, p, bytesLeft, 0);
+	    if (code != TCL_OK) {
+		goto error;
+	    }
+	    for (i = 0; i < objectsUsed; i++) {
+		Tcl_DecrRefCount(objv[i]);
 	    }
-	    p++;
-	} else if (p == lastChar) {
-	    return p;
-	} else {
-	    p++;
+	    objectsUsed = 0;
+	    if (objv != staticObjArray) {
+		ckfree((char *) objv);
+		objv = staticObjArray;
+	    }
+	}
+
+	/*
+	 * Advance to the next command in the script.
+	 */
+
+	next = parse.commandStart + parse.commandSize;
+	bytesLeft -= next - p;
+	p = next;
+	Tcl_FreeParse(&parse);
+	gotParse = 0;
+	if ((nested != 0) && (p > script) && (p[-1] == ']')) {
+	    /*
+	     * We get here in the special case where the TCL_BRACKET_TERM
+	     * flag was set in the interpreter and we reached a close
+	     * bracket in the script.  Return immediately.
+	     */
+
+	    iPtr->termOffset = (p - 1) - script;
+	    iPtr->varFramePtr = savedVarFramePtr;
+	    return TCL_OK;
 	}
+    } while (bytesLeft > 0);
+    iPtr->termOffset = p - script;
+    iPtr->varFramePtr = savedVarFramePtr;
+    return TCL_OK;
+
+    error:
+    /*
+     * Generate various pieces of error information, such as the line
+     * number where the error occurred and information to add to the
+     * errorInfo variable.  Then free resources that had been allocated
+     * to the command.
+     */
+
+    if ((code == TCL_ERROR) && !(iPtr->flags & ERR_ALREADY_LOGGED)) { 
+	commandLength = parse.commandSize;
+	if ((parse.commandStart + commandLength) != (script + numBytes)) {
+	    /*
+	     * The command where the error occurred didn't end at the end
+	     * of the script (i.e. it ended at a terminator character such
+	     * as ";".  Reduce the length by one so that the error message
+	     * doesn't include the terminator character.
+	     */
+	    
+	    commandLength -= 1;
+	}
+	Tcl_LogCommandInfo(interp, script, parse.commandStart, commandLength);
+    }
+    
+    for (i = 0; i < objectsUsed; i++) {
+	Tcl_DecrRefCount(objv[i]);
+    }
+    if (gotParse) {
+	Tcl_FreeParse(&parse);
+    }
+    if (objv != staticObjArray) {
+	ckfree((char *) objv);
     }
-    return p-1;
+    iPtr->varFramePtr = savedVarFramePtr;
+    return code;
 }
 
 /*
  *----------------------------------------------------------------------
  *
- * VarNameEnd --
+ * Tcl_Eval --
  *
- *	Given a pointer to a variable reference using $-notation, find
- *	the end of the variable name spec.
+ *	Execute a Tcl command in a string.  This procedure executes the
+ *	script directly, rather than compiling it to bytecodes.  Before
+ *	the arrival of the bytecode compiler in Tcl 8.0 Tcl_Eval was
+ *	the main procedure used for executing Tcl commands, but nowadays
+ *	it isn't used much.
  *
  * Results:
- *	The return value is a pointer to the last character that
- *	is part of the variable name.  If the variable name doesn't
- *	terminate properly then the return value is a pointer to the
- *	null character at the end of the string.
+ *	The return value is one of the return codes defined in tcl.h
+ *	(such as TCL_OK), and interp's result contains a value
+ *	to supplement the return code. The value of the result
+ *	will persist only until the next call to Tcl_Eval or Tcl_EvalObj:
+ *	you must copy it or lose it!
  *
  * Side effects:
- *	None.
+ *	Can be almost arbitrary, depending on the commands in the script.
  *
  *----------------------------------------------------------------------
  */
 
-static char *
-VarNameEnd(string, lastChar)
-    char *string;		/* Pointer to dollar-sign character. */
-    char *lastChar;		/* Terminating character in string. */
+int
+Tcl_Eval(interp, string)
+    Tcl_Interp *interp;		/* Token for command interpreter (returned
+				 * by previous call to Tcl_CreateInterp). */
+    char *string;		/* Pointer to TCL command to execute. */
 {
-    register char *p = string+1;
+    int code;
 
-    if (*p == '{') {
-	for (p++; (*p != '}') && (p != lastChar); p++) {
-	    /* Empty loop body. */
-	}
-	return p;
-    }
-    while (isalnum(UCHAR(*p)) || (*p == '_')) {
-	p++;
-    }
-    if ((*p == '(') && (p != string+1)) {
-	return QuoteEnd(p+1, lastChar, ')');
-    }
-    return p-1;
+    code = Tcl_EvalEx(interp, string, -1, 0);
+
+    /*
+     * For backwards compatibility with old C code that predates the
+     * object system in Tcl 8.0, we have to mirror the object result
+     * back into the string result (some callers may expect it there).
+     */
+
+    Tcl_SetResult(interp, TclGetString(Tcl_GetObjResult(interp)),
+	    TCL_VOLATILE);
+    return code;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_EvalObj, Tcl_GlobalEvalObj --
+ *
+ *	These functions are deprecated but we keep them around for backwards
+ *	compatibility reasons.
+ *
+ * Results:
+ *	See the functions they call.
+ *
+ * Side effects:
+ *	See the functions they call.
+ *
+ *----------------------------------------------------------------------
+ */
+
+#undef Tcl_EvalObj
+int
+Tcl_EvalObj(interp, objPtr)
+    Tcl_Interp * interp;
+    Tcl_Obj * objPtr;
+{
+    return Tcl_EvalObjEx(interp, objPtr, 0);
 }
 
+#undef Tcl_GlobalEvalObj
+int
+Tcl_GlobalEvalObj(interp, objPtr)
+    Tcl_Interp * interp;
+    Tcl_Obj * objPtr;
+{
+    return Tcl_EvalObjEx(interp, objPtr, TCL_EVAL_GLOBAL);
+}
 
 /*
  *----------------------------------------------------------------------
  *
- * ScriptEnd --
+ * Tcl_ParseVarName --
  *
- *	Given a pointer to the beginning of a Tcl script, find the end of
- *	the script.
+ *	Given a string starting with a $ sign, parse off a variable
+ *	name and return information about the parse.
  *
  * Results:
- *	The return value is a pointer to the last character that's part
- *	of the script pointed to by "p".  If the command doesn't end
- *	properly within the string then the return value is the address
- *	of the null character at the end of the string.
+ *	The return value is TCL_OK if the command was parsed
+ *	successfully and TCL_ERROR otherwise.  If an error occurs and
+ *	interp isn't NULL then an error message is left in its result. 
+ *	On a successful return, tokenPtr and numTokens fields of
+ *	parsePtr are filled in with information about the variable name
+ *	that was parsed.  The "size" field of the first new token gives
+ *	the total number of bytes in the variable name.  Other fields in
+ *	parsePtr are undefined.
  *
  * Side effects:
- *	None.
+ *	If there is insufficient space in parsePtr to hold all the
+ *	information about the command, then additional space is
+ *	malloc-ed.  If the procedure returns TCL_OK then the caller must
+ *	eventually invoke Tcl_FreeParse to release any additional space
+ *	that was allocated.
  *
  *----------------------------------------------------------------------
  */
 
-static char *
-ScriptEnd(p, lastChar, nested)
-    char *p;			/* Script to check. */
-    char *lastChar;		/* Terminating character in string. */
-    int nested;			/* Zero means this is a top-level command.
-				 * One means this is a nested command (the
-				 * last character of the script must be
-				 * an unquoted ]). */
+int
+Tcl_ParseVarName(interp, string, numBytes, parsePtr, append)
+    Tcl_Interp *interp;		/* Interpreter to use for error reporting;
+				 * if NULL, then no error message is
+				 * provided. */
+    char *string;		/* String containing variable name.  First
+				 * character must be "$". */
+    int numBytes;		/* Total number of bytes in string.  If < 0,
+				 * the string consists of all bytes up to the
+				 * first null character. */
+    Tcl_Parse *parsePtr;	/* Structure to fill in with information
+				 * about the variable name. */
+    int append;			/* Non-zero means append tokens to existing
+				 * information in parsePtr; zero means ignore
+				 * existing tokens in parsePtr and reinitialize
+				 * it. */
 {
-    int commentOK = 1;
-    int length;
+    Tcl_Token *tokenPtr;
+    char *end, *src;
+    unsigned char c;
+    int varIndex, offset;
+    Tcl_UniChar ch;
 
-    while (1) {
-	while (isspace(UCHAR(*p))) {
-	    if (*p == '\n') {
-		commentOK = 1;
-	    }
-	    p++;
-	}
-	if ((*p == '#') && commentOK) {
-	    do {
-		if (*p == '\\') {
-		    /*
-		     * If the script ends with backslash-newline, then
-		     * this command isn't complete.
-		     */
-
-		    if ((p[1] == '\n') && (p+2 == lastChar)) {
-			return p+2;
-		    }
-		    Tcl_Backslash(p, &length);
-		    p += length;
-		} else {
-		    p++;
+    if (numBytes >= 0) {
+	end = string + numBytes;
+    } else {
+	end = string + strlen(string);
+    }
+
+    if (!append) {
+	parsePtr->numWords = 0;
+	parsePtr->tokenPtr = parsePtr->staticTokens;
+	parsePtr->numTokens = 0;
+	parsePtr->tokensAvailable = NUM_STATIC_TOKENS;
+	parsePtr->string = string;
+	parsePtr->end = end;
+	parsePtr->interp = interp;
+	parsePtr->incomplete = 0;
+    }
+
+    /*
+     * Generate one token for the variable, an additional token for the
+     * name, plus any number of additional tokens for the index, if
+     * there is one.
+     */
+
+    src = string;
+    if ((parsePtr->numTokens + 2) > parsePtr->tokensAvailable) {
+	TclExpandTokenArray(parsePtr);
+    }
+    tokenPtr = &parsePtr->tokenPtr[parsePtr->numTokens];
+    tokenPtr->type = TCL_TOKEN_VARIABLE;
+    tokenPtr->start = src;
+    varIndex = parsePtr->numTokens;
+    parsePtr->numTokens++;
+    tokenPtr++;
+    src++;
+    if (src >= end) {
+	goto justADollarSign;
+    }
+    tokenPtr->type = TCL_TOKEN_TEXT;
+    tokenPtr->start = src;
+    tokenPtr->numComponents = 0;
+
+    /*
+     * The name of the variable can have three forms:
+     * 1. The $ sign is followed by an open curly brace.  Then 
+     *    the variable name is everything up to the next close
+     *    curly brace, and the variable is a scalar variable.
+     * 2. The $ sign is not followed by an open curly brace.  Then
+     *    the variable name is everything up to the next
+     *    character that isn't a letter, digit, or underscore.
+     *    :: sequences are also considered part of the variable
+     *    name, in order to support namespaces. If the following
+     *    character is an open parenthesis, then the information
+     *    between parentheses is the array element name.
+     * 3. The $ sign is followed by something that isn't a letter,
+     *    digit, or underscore:  in this case, there is no variable
+     *    name and the token is just "$".
+     */
+
+    if (*src == '{') {
+	src++;
+	tokenPtr->type = TCL_TOKEN_TEXT;
+	tokenPtr->start = src;
+	tokenPtr->numComponents = 0;
+	while (1) {
+	    if (src == end) {
+		if (interp != NULL) {
+		    Tcl_SetResult(interp,
+			"missing close-brace for variable name",
+			TCL_STATIC);
 		}
-	    } while ((p != lastChar) && (*p != '\n'));
-	    continue;
+		parsePtr->term = tokenPtr->start-1;
+		parsePtr->incomplete = 1;
+		goto error;
+	    }
+	    if (*src == '}') {
+		break;
+	    }
+	    src++;
 	}
-	p = TclWordEnd(p, lastChar, nested, &commentOK);
-	if (p == lastChar) {
-	    return p;
+	tokenPtr->size = src - tokenPtr->start;
+	tokenPtr[-1].size = src - tokenPtr[-1].start;
+	parsePtr->numTokens++;
+	src++;
+    } else {
+	tokenPtr->type = TCL_TOKEN_TEXT;
+	tokenPtr->start = src;
+	tokenPtr->numComponents = 0;
+	while (src != end) {
+	    offset = Tcl_UtfToUniChar(src, &ch);
+	    c = UCHAR(ch);
+	    if (isalnum(c) || (c == '_')) { /* INTL: ISO only, UCHAR. */
+		src += offset;
+		continue;
+	    }
+	    if ((c == ':') && (((src+1) != end) && (src[1] == ':'))) {
+		src += 2;
+		while ((src != end) && (*src == ':')) {
+		    src += 1;
+		}
+		continue;
+	    }
+	    break;
 	}
-	p++;
-	if (nested) {
-	    if (*p == ']') {
-		return p;
+	tokenPtr->size = src - tokenPtr->start;
+	if (tokenPtr->size == 0) {
+	    goto justADollarSign;
+	}
+	parsePtr->numTokens++;
+	if ((src != end) && (*src == '(')) {
+	    /*
+	     * This is a reference to an array element.  Call
+	     * ParseTokens recursively to parse the element name,
+	     * since it could contain any number of substitutions.
+	     */
+
+	    if (ParseTokens(src+1, TYPE_CLOSE_PAREN, parsePtr)
+		    != TCL_OK) {
+		goto error;
 	    }
-	} else {
-	    if (p == lastChar) {
-		return p-1;
+	    if ((parsePtr->term == end) || (*parsePtr->term != ')')) { 
+		if (parsePtr->interp != NULL) {
+		    Tcl_SetResult(parsePtr->interp, "missing )",
+			    TCL_STATIC);
+		}
+		parsePtr->term = src;
+		parsePtr->incomplete = 1;
+		goto error;
 	    }
+	    src = parsePtr->term + 1;
 	}
     }
+    tokenPtr = &parsePtr->tokenPtr[varIndex];
+    tokenPtr->size = src - tokenPtr->start;
+    tokenPtr->numComponents = parsePtr->numTokens - (varIndex + 1);
+    return TCL_OK;
+
+    /*
+     * The dollar sign isn't followed by a variable name.
+     * replace the TCL_TOKEN_VARIABLE token with a
+     * TCL_TOKEN_TEXT token for the dollar sign.
+     */
+
+    justADollarSign:
+    tokenPtr = &parsePtr->tokenPtr[varIndex];
+    tokenPtr->type = TCL_TOKEN_TEXT;
+    tokenPtr->size = 1;
+    tokenPtr->numComponents = 0;
+    return TCL_OK;
+
+    error:
+    if (parsePtr->tokenPtr != parsePtr->staticTokens) {
+	ckfree((char *) parsePtr->tokenPtr);
+	parsePtr->tokenPtr = parsePtr->staticTokens;
+    }
+    return TCL_ERROR;
 }
 
 /*
@@ -738,7 +1755,7 @@ ScriptEnd(p, lastChar, nested)
  *	*termPtr gets filled in with the address of the character
  *	just after the last one in the variable specifier.  If the
  *	variable doesn't exist, then the return value is NULL and
- *	an error message will be left in interp->result.
+ *	an error message will be left in interp's result.
  *
  * Side effects:
  *	None.
@@ -756,120 +1773,347 @@ Tcl_ParseVar(interp, string, termPtr)
 					 * one in the variable specifier. */
 
 {
-    char *name1, *name1End, c, *result;
-    register char *name2;
-#define NUM_CHARS 200
-    char copyStorage[NUM_CHARS];
-    ParseValue pv;
+    Tcl_Parse parse;
+    register Tcl_Obj *objPtr;
+
+    if (Tcl_ParseVarName(interp, string, -1, &parse, 0) != TCL_OK) {
+	return NULL;
+    }
+
+    if (termPtr != NULL) {
+	*termPtr = string + parse.tokenPtr->size;
+    }
+    if (parse.numTokens == 1) {
+	/*
+	 * There isn't a variable name after all: the $ is just a $.
+	 */
+
+	return "$";
+    }
+
+    objPtr = Tcl_EvalTokens(interp, parse.tokenPtr, parse.numTokens);
+    if (objPtr == NULL) {
+	return NULL;
+    }
 
     /*
-     * There are three cases:
-     * 1. The $ sign is followed by an open curly brace.  Then the variable
-     *    name is everything up to the next close curly brace, and the
-     *    variable is a scalar variable.
-     * 2. The $ sign is not followed by an open curly brace.  Then the
-     *    variable name is everything up to the next character that isn't
-     *    a letter, digit, or underscore, or a "::" namespace separator.
-     *    If the following character is an open parenthesis, then the
-     *    information between parentheses is the array element name, which
-     *    can include any of the substitutions permissible between quotes.
-     * 3. The $ sign is followed by something that isn't a letter, digit,
-     *    underscore, or a "::" namespace separator: in this case,
-     *    there is no variable name, and "$" is returned.
+     * At this point we should have an object containing the value of
+     * a variable.  Just return the string from that object.
      */
 
-    name2 = NULL;
-    string++;
-    if (*string == '{') {
-	string++;
-	name1 = string;
-	while (*string != '}') {
-	    if (*string == 0) {
-		Tcl_SetResult(interp, "missing close-brace for variable name",
-			TCL_STATIC);
-		if (termPtr != 0) {
-		    *termPtr = string;
-		}
-		return NULL;
-	    }
-	    string++;
-	}
-	name1End = string;
-	string++;
+#ifdef TCL_COMPILE_DEBUG
+    if (objPtr->refCount < 2) {
+	panic("Tcl_ParseVar got temporary object from Tcl_EvalTokens");
+    }
+#endif /*TCL_COMPILE_DEBUG*/    
+    TclDecrRefCount(objPtr);
+    return TclGetString(objPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_ParseBraces --
+ *
+ *	Given a string in braces such as a Tcl command argument or a string
+ *	value in a Tcl expression, this procedure parses the string and
+ *	returns information about the parse.
+ *
+ * Results:
+ *	The return value is TCL_OK if the string was parsed successfully and
+ *	TCL_ERROR otherwise. If an error occurs and interp isn't NULL then
+ *	an error message is left in its result. On a successful return,
+ *	tokenPtr and numTokens fields of parsePtr are filled in with
+ *	information about the string that was parsed. Other fields in
+ *	parsePtr are undefined. termPtr is set to point to the character
+ *	just after the last one in the braced string.
+ *
+ * Side effects:
+ *	If there is insufficient space in parsePtr to hold all the
+ *	information about the command, then additional space is
+ *	malloc-ed. If the procedure returns TCL_OK then the caller must
+ *	eventually invoke Tcl_FreeParse to release any additional space
+ *	that was allocated.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_ParseBraces(interp, string, numBytes, parsePtr, append, termPtr)
+    Tcl_Interp *interp;		/* Interpreter to use for error reporting;
+				 * if NULL, then no error message is
+				 * provided. */
+    char *string;		/* String containing the string in braces.
+				 * The first character must be '{'. */
+    int numBytes;		/* Total number of bytes in string. If < 0,
+				 * the string consists of all bytes up to
+				 * the first null character. */
+    register Tcl_Parse *parsePtr;
+    				/* Structure to fill in with information
+				 * about the string. */
+    int append;			/* Non-zero means append tokens to existing
+				 * information in parsePtr; zero means
+				 * ignore existing tokens in parsePtr and
+				 * reinitialize it. */
+    char **termPtr;		/* If non-NULL, points to word in which to
+				 * store a pointer to the character just
+				 * after the terminating '}' if the parse
+				 * was successful. */
+
+{
+    char utfBytes[TCL_UTF_MAX];	/* For result of backslash substitution. */
+    Tcl_Token *tokenPtr;
+    register char *src, *end;
+    int startIndex, level, length;
+
+    if ((numBytes >= 0) || (string == NULL)) {
+	end = string + numBytes;
     } else {
-	name1 = string;
-	while (isalnum(UCHAR(*string)) || (*string == '_')
-	        || (*string == ':')) {
-	    if (*string == ':') {
-		if (*(string+1) == ':') {
-                    string += 2;  /* skip over the initial :: */
-		    while (*string == ':') {
-			string++; /* skip over a subsequent : */
-		    }
-		} else {
-		    break;	  /* : by itself */
-                }
+	end = string + strlen(string);
+    }
+    
+    if (!append) {
+	parsePtr->numWords = 0;
+	parsePtr->tokenPtr = parsePtr->staticTokens;
+	parsePtr->numTokens = 0;
+	parsePtr->tokensAvailable = NUM_STATIC_TOKENS;
+	parsePtr->string = string;
+	parsePtr->end = end;
+	parsePtr->interp = interp;
+    }
+
+    src = string+1;
+    startIndex = parsePtr->numTokens;
+
+    if (parsePtr->numTokens == parsePtr->tokensAvailable) {
+	TclExpandTokenArray(parsePtr);
+    }
+    tokenPtr = &parsePtr->tokenPtr[startIndex];
+    tokenPtr->type = TCL_TOKEN_TEXT;
+    tokenPtr->start = src;
+    tokenPtr->numComponents = 0;
+    level = 1;
+    while (1) {
+	while (CHAR_TYPE(*src) == TYPE_NORMAL) {
+	    src++;
+	}
+	if (*src == '}') {
+	    level--;
+	    if (level == 0) {
+		break;
+	    }
+	    src++;
+	} else if (*src == '{') {
+	    level++;
+	    src++;
+	} else if (*src == '\\') {
+	    Tcl_UtfBackslash(src, &length, utfBytes);
+	    if (src[1] == '\n') {
+		/*
+		 * A backslash-newline sequence must be collapsed, even
+		 * inside braces, so we have to split the word into
+		 * multiple tokens so that the backslash-newline can be
+		 * represented explicitly.
+		 */
+		
+		if ((src + 2) == end) {
+		    parsePtr->incomplete = 1;
+		}
+		tokenPtr->size = (src - tokenPtr->start);
+		if (tokenPtr->size != 0) {
+		    parsePtr->numTokens++;
+		}
+		if ((parsePtr->numTokens+1) >= parsePtr->tokensAvailable) {
+		    TclExpandTokenArray(parsePtr);
+		}
+		tokenPtr = &parsePtr->tokenPtr[parsePtr->numTokens];
+		tokenPtr->type = TCL_TOKEN_BS;
+		tokenPtr->start = src;
+		tokenPtr->size = length;
+		tokenPtr->numComponents = 0;
+		parsePtr->numTokens++;
+		
+		src += length;
+		tokenPtr++;
+		tokenPtr->type = TCL_TOKEN_TEXT;
+		tokenPtr->start = src;
+		tokenPtr->numComponents = 0;
 	    } else {
-		string++;
+		src += length;
 	    }
-	}
-	if (string == name1) {
-	    if (termPtr != 0) {
-		*termPtr = string;
+	} else if (src == end) {
+	    if (interp != NULL) {
+		Tcl_SetResult(interp, "missing close-brace", TCL_STATIC);
 	    }
-	    return "$";
+	    parsePtr->term = string;
+	    parsePtr->incomplete = 1;
+	    goto error;
+	} else {
+	    src++;
 	}
-	name1End = string;
-	if (*string == '(') {
-	    char *end;
+    }
 
-	    /*
-	     * Perform substitutions on the array element name, just as
-	     * is done for quotes.
-	     */
+    /*
+     * Decide if we need to finish emitting a partially-finished token.
+     * There are 3 cases:
+     *     {abc \newline xyz} or {xyz}	- finish emitting "xyz" token
+     *     {abc \newline}		- don't emit token after \newline
+     *     {}				- finish emitting zero-sized token
+     * The last case ensures that there is a token (even if empty) that
+     * describes the braced string.
+     */
+    
+    if ((src != tokenPtr->start)
+	    || (parsePtr->numTokens == startIndex)) {
+	tokenPtr->size = (src - tokenPtr->start);
+	parsePtr->numTokens++;
+    }
+    if (termPtr != NULL) {
+	*termPtr = src+1;
+    }
+    return TCL_OK;
 
-	    pv.buffer = pv.next = copyStorage;
-	    pv.end = copyStorage + NUM_CHARS - 1;
-	    pv.expandProc = TclExpandParseValue;
-	    pv.clientData = (ClientData) NULL;
-	    if (TclParseQuotes(interp, string+1, ')', 0, &end, &pv)
-		    != TCL_OK) {
-		char msg[200];
-		int length;
+    error:
+    if (parsePtr->tokenPtr != parsePtr->staticTokens) {
+	ckfree((char *) parsePtr->tokenPtr);
+	parsePtr->tokenPtr = parsePtr->staticTokens;
+    }
+    return TCL_ERROR;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_ParseQuotedString --
+ *
+ *	Given a double-quoted string such as a quoted Tcl command argument
+ *	or a quoted value in a Tcl expression, this procedure parses the
+ *	string and returns information about the parse.
+ *
+ * Results:
+ *	The return value is TCL_OK if the string was parsed successfully and
+ *	TCL_ERROR otherwise. If an error occurs and interp isn't NULL then
+ *	an error message is left in its result. On a successful return,
+ *	tokenPtr and numTokens fields of parsePtr are filled in with
+ *	information about the string that was parsed. Other fields in
+ *	parsePtr are undefined. termPtr is set to point to the character
+ *	just after the quoted string's terminating close-quote.
+ *
+ * Side effects:
+ *	If there is insufficient space in parsePtr to hold all the
+ *	information about the command, then additional space is
+ *	malloc-ed. If the procedure returns TCL_OK then the caller must
+ *	eventually invoke Tcl_FreeParse to release any additional space
+ *	that was allocated.
+ *
+ *----------------------------------------------------------------------
+ */
 
-		length = string-name1;
-		if (length > 100) {
-		    length = 100;
-		}
-		sprintf(msg, "\n    (parsing index for array \"%.*s\")",
-			length, name1);
-		Tcl_AddErrorInfo(interp, msg);
-		result = NULL;
-		name2 = pv.buffer;
-		if (termPtr != 0) {
-		    *termPtr = end;
-		}
-		goto done;
-	    }
-	    Tcl_ResetResult(interp);
-	    string = end;
-	    name2 = pv.buffer;
+int
+Tcl_ParseQuotedString(interp, string, numBytes, parsePtr, append, termPtr)
+    Tcl_Interp *interp;		/* Interpreter to use for error reporting;
+				 * if NULL, then no error message is
+				 * provided. */
+    char *string;		/* String containing the quoted string. 
+				 * The first character must be '"'. */
+    int numBytes;		/* Total number of bytes in string. If < 0,
+				 * the string consists of all bytes up to
+				 * the first null character. */
+    register Tcl_Parse *parsePtr;
+    				/* Structure to fill in with information
+				 * about the string. */
+    int append;			/* Non-zero means append tokens to existing
+				 * information in parsePtr; zero means
+				 * ignore existing tokens in parsePtr and
+				 * reinitialize it. */
+    char **termPtr;		/* If non-NULL, points to word in which to
+				 * store a pointer to the character just
+				 * after the quoted string's terminating
+				 * close-quote if the parse succeeds. */
+{
+    char *end;
+    
+    if ((numBytes >= 0) || (string == NULL)) {
+	end = string + numBytes;
+    } else {
+	end = string + strlen(string);
+    }
+    
+    if (!append) {
+	parsePtr->numWords = 0;
+	parsePtr->tokenPtr = parsePtr->staticTokens;
+	parsePtr->numTokens = 0;
+	parsePtr->tokensAvailable = NUM_STATIC_TOKENS;
+	parsePtr->string = string;
+	parsePtr->end = end;
+	parsePtr->interp = interp;
+    }
+    
+    if (ParseTokens(string+1, TYPE_QUOTE, parsePtr) != TCL_OK) {
+	goto error;
+    }
+    if (*parsePtr->term != '"') {
+	if (interp != NULL) {
+	    Tcl_SetResult(parsePtr->interp, "missing \"", TCL_STATIC);
 	}
+	parsePtr->term = string;
+	parsePtr->incomplete = 1;
+	goto error;
     }
-    if (termPtr != 0) {
-	*termPtr = string;
+    if (termPtr != NULL) {
+	*termPtr = (parsePtr->term + 1);
     }
+    return TCL_OK;
 
-    c = *name1End;
-    *name1End = 0;
-    result = Tcl_GetVar2(interp, name1, name2, TCL_LEAVE_ERR_MSG);
-    *name1End = c;
+    error:
+    if (parsePtr->tokenPtr != parsePtr->staticTokens) {
+	ckfree((char *) parsePtr->tokenPtr);
+	parsePtr->tokenPtr = parsePtr->staticTokens;
+    }
+    return TCL_ERROR;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * CommandComplete --
+ *
+ *	This procedure is shared by TclCommandComplete and
+ *	Tcl_ObjCommandcoComplete; it does all the real work of seeing
+ *	whether a script is complete
+ *
+ * Results:
+ *	1 is returned if the script is complete, 0 if there are open
+ *	delimiters such as " or (. 1 is also returned if there is a
+ *	parse error in the script other than unmatched delimiters.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
 
-    done:
-    if ((name2 != NULL) && (pv.buffer != copyStorage)) {
-	ckfree(pv.buffer);
+static int
+CommandComplete(script, length)
+    char *script;			/* Script to check. */
+    int length;				/* Number of bytes in script. */
+{
+    Tcl_Parse parse;
+    char *p, *end;
+
+    p = script;
+    end = p + length;
+    while (Tcl_ParseCommand((Tcl_Interp *) NULL, p, end - p, 0, &parse)
+	    == TCL_OK) {
+	p = parse.commandStart + parse.commandSize;
+	if (*p == 0) {
+	    break;
+	}
+    }
+    if (parse.incomplete) {
+	return 0;
     }
-    return result;
+    return 1;
 }
 
 /*
@@ -877,12 +2121,14 @@ Tcl_ParseVar(interp, string, termPtr)
  *
  * Tcl_CommandComplete --
  *
- *	Given a partial or complete Tcl command, this procedure
- *	determines whether the command is complete in the sense
+ *	Given a partial or complete Tcl script, this procedure
+ *	determines whether the script is complete in the sense
  *	of having matched braces and quotes and brackets.
  *
  * Results:
- *	1 is returned if the command is complete, 0 otherwise.
+ *	1 is returned if the script is complete, 0 otherwise.
+ *	1 is also returned if there is a parse error in the script
+ *	other than unmatched delimiters.
  *
  * Side effects:
  *	None.
@@ -891,16 +2137,10 @@ Tcl_ParseVar(interp, string, termPtr)
  */
 
 int
-Tcl_CommandComplete(cmd)
-    char *cmd;			/* Command to check. */
+Tcl_CommandComplete(script)
+    char *script;			/* Script to check. */
 {
-    char *p;
-
-    if (*cmd == 0) {
-	return 1;
-    }
-    p = ScriptEnd(cmd, cmd+strlen(cmd), 0);
-    return (*p != 0);
+    return CommandComplete(script, (int) strlen(script));
 }
 
 /*
@@ -922,17 +2162,63 @@ Tcl_CommandComplete(cmd)
  */
 
 int
-TclObjCommandComplete(cmdPtr)
-    Tcl_Obj *cmdPtr;			/* Points to object holding command
+TclObjCommandComplete(objPtr)
+    Tcl_Obj *objPtr;			/* Points to object holding script
 					 * to check. */
 {
-    char *cmd, *p;
+    char *script;
     int length;
 
-    cmd = Tcl_GetStringFromObj(cmdPtr, &length);
-    if (length == 0) {
-	return 1;
+    script = Tcl_GetStringFromObj(objPtr, &length);
+    return CommandComplete(script, length);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclIsLocalScalar --
+ *
+ *	Check to see if a given string is a legal scalar variable
+ *	name with no namespace qualifiers or substitutions.
+ *
+ * Results:
+ *	Returns 1 if the variable is a local scalar.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclIsLocalScalar(src, len)
+    CONST char *src;
+    int len;
+{
+    CONST char *p;
+    CONST char *lastChar = src + (len - 1);
+
+    for (p = src; p <= lastChar; p++) {
+	if ((CHAR_TYPE(*p) != TYPE_NORMAL) &&
+		(CHAR_TYPE(*p) != TYPE_COMMAND_END)) {
+	    /*
+	     * TCL_COMMAND_END is returned for the last character
+	     * of the string.  By this point we know it isn't
+	     * an array or namespace reference.
+	     */
+
+	    return 0;
+	}
+	if  (*p == '(') {
+	    if (*lastChar == ')') { /* we have an array element */
+		return 0;
+	    }
+	} else if (*p == ':') {
+	    if ((p != lastChar) && *(p+1) == ':') { /* qualified name */
+		return 0;
+	    }
+	}
     }
-    p = ScriptEnd(cmd, cmd+length, /*nested*/ 0);
-    return (*p != 0);
+	
+    return 1;
 }